"""
网络工具模块

提供网络搜索、URL 获取等功能。
"""

import json
from datetime import datetime
from typing import Any, Dict, List, Optional

from .base import WebTool, ToolResult, ToolError


class WebSearchTool(WebTool):
    """网络搜索工具"""
    
    def __init__(self):
        super().__init__(
            name="web_search",
            description="执行网络搜索",
            version="1.0.0"
        )
        self.search_engines = {
            'google': 'https://www.google.com/search',
            'bing': 'https://www.bing.com/search',
            'duckduckgo': 'https://duckduckgo.com/'
        }
    
    def get_parameters(self) -> Dict[str, Dict[str, Any]]:
        return {
            'query': {
                'type': str,
                'required': True,
                'description': '搜索查询'
            },
            'engine': {
                'type': str,
                'required': False,
                'default': 'duckduckgo',
                'choices': ['google', 'bing', 'duckduckgo'],
                'description': '搜索引擎'
            },
            'max_results': {
                'type': int,
                'required': False,
                'default': 10,
                'min': 1,
                'max': 50,
                'description': '最大结果数量'
            },
            'language': {
                'type': str,
                'required': False,
                'default': 'zh-CN',
                'description': '搜索语言'
            }
        }
    
    def execute(self, **kwargs) -> ToolResult:
        """执行网络搜索"""
        start_time = datetime.now()
        
        try:
            if not self.validate_parameters(**kwargs):
                return self._create_result(False, error="参数验证失败")
            
            query = kwargs['query']
            engine = kwargs.get('engine', 'duckduckgo')
            max_results = kwargs.get('max_results', 10)
            language = kwargs.get('language', 'zh-CN')
            
            # 执行搜索
            results = self._perform_search(query, engine, max_results, language)
            
            execution_time = (datetime.now() - start_time).total_seconds()
            
            return self._create_result(
                success=True,
                data={
                    'results': results,
                    'query': query,
                    'engine': engine,
                    'count': len(results)
                },
                message=f"找到 {len(results)} 个搜索结果",
                execution_time=execution_time
            )
            
        except Exception as e:
            execution_time = (datetime.now() - start_time).total_seconds()
            return self._create_result(
                success=False,
                error=str(e),
                execution_time=execution_time
            )
    
    def _perform_search(self, query: str, engine: str, max_results: int, language: str) -> List[Dict[str, Any]]:
        """执行搜索"""
        # 这里是一个简化的实现，实际应用中需要处理不同搜索引擎的API
        # 或者使用第三方搜索API
        
        # 模拟搜索结果
        results = []
        for i in range(min(max_results, 5)):  # 限制为5个结果以避免实际网络请求
            results.append({
                'title': f"搜索结果 {i+1}: {query}",
                'url': f"https://example.com/result-{i+1}",
                'snippet': f"这是关于 '{query}' 的搜索结果摘要 {i+1}",
                'rank': i + 1
            })
        
        return results


class URLFetchTool(WebTool):
    """URL 获取工具"""
    
    def __init__(self):
        super().__init__(
            name="url_fetch",
            description="获取 URL 内容",
            version="1.0.0"
        )
    
    def get_parameters(self) -> Dict[str, Dict[str, Any]]:
        return {
            'url': {
                'type': str,
                'required': True,
                'description': '要获取的 URL'
            },
            'method': {
                'type': str,
                'required': False,
                'default': 'GET',
                'choices': ['GET', 'POST', 'PUT', 'DELETE'],
                'description': 'HTTP 方法'
            },
            'headers': {
                'type': dict,
                'required': False,
                'description': '请求头'
            },
            'data': {
                'type': dict,
                'required': False,
                'description': '请求数据（POST/PUT 时使用）'
            },
            'timeout': {
                'type': int,
                'required': False,
                'default': 30,
                'min': 1,
                'max': 300,
                'description': '超时时间（秒）'
            },
            'follow_redirects': {
                'type': bool,
                'required': False,
                'default': True,
                'description': '是否跟随重定向'
            }
        }
    
    def execute(self, **kwargs) -> ToolResult:
        """执行 URL 获取"""
        start_time = datetime.now()
        
        try:
            if not self.validate_parameters(**kwargs):
                return self._create_result(False, error="参数验证失败")
            
            url = kwargs['url']
            method = kwargs.get('method', 'GET')
            headers = kwargs.get('headers', {})
            data = kwargs.get('data')
            timeout = kwargs.get('timeout', 30)
            follow_redirects = kwargs.get('follow_redirects', True)
            
            # 设置超时
            self.timeout = timeout
            
            # 执行请求
            response = self._make_request(url, method, headers, data)
            
            execution_time = (datetime.now() - start_time).total_seconds()
            
            return self._create_result(
                success=True,
                data={
                    'url': url,
                    'method': method,
                    'status_code': response['status_code'],
                    'headers': response['headers'],
                    'content': response['content'][:1000],  # 限制内容长度
                    'content_length': len(response['content']),
                    'json_data': response.get('json')
                },
                message=f"成功获取 URL: {url}",
                execution_time=execution_time
            )
            
        except Exception as e:
            execution_time = (datetime.now() - start_time).total_seconds()
            return self._create_result(
                success=False,
                error=str(e),
                execution_time=execution_time
            )
